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Old 03-28-2014, 12:15 PM   #1
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Question spidevB.C not shown in /dev/

I enabled the user mode SPI device driver at make menuconfig.

After compiling the kernel, device tree, etc and reboot, the /sys/bus/spi/drivers/spidev is present. Also, $cat /proc/devices includes 153 spi

Now, I assumed this driver will detect the spi device once it connects to the processor via SPI bus. But the connected device is not shown in /dev/ directory, where I was expecting something like /dev/spidevB.C.

Do I need to $mknod manually?? Even I make the node manually, it is not shown in /sys/bus/spi/devices/, so I doubt the created one is really binded to the spi device driver.

By the way, in the device tree file, I have cell-index = <1>, which indicates SPI2, and <reg> = 0, which indicates chip select 0, so I was expecting the /dev/spidev2.0.

Thanks in advance for any help!


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